I could use some help!! (worth 25 points)
2 answers:
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We have to find the simplest ratio between length, breadth and the height.
Here,
- Length = 10 cm
- Breadth = 15 cm
- Height = 25 cm
Note:
- Always check the units first.
- Then find the HCF of the numbers to simplify them into the simplest ratio.
So,
HCF of 10, 15 and 25 is 5. Cancelling with respect to 5.
Then, the ratio will be 2:3:5 (Option A)
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We need to use the formula to find Margin of Error but through the sample proportion, that is
We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)
A) For A our (proportion) is equal to 0.45. So applying the formula,
B) We make the same of point A, but change our proportion to 0.35
c) We need to calculate the SE through proportion for 0.1, that is
Then our Error is given by,